This review is by Kalina Wilson, who can also be found at geminica.com.
Antietam (pronounced something like an-TEE-dum) is not one of the more frequently appreciated colors of Noodler's ink, but I'm a big fan. This ink is generally described as looking "antique" or like dried blood. It caught my eye while searching for a rich, red-tinted brown, and it fits the bill very, very well.
Because the color has such strong shading, it changes a lot depending on what you're using it with - your paper and especially your pen make a huge difference. In general, the thicker it is laid on and the less absorbent your paper, the more the ink moves towards an extremely rich deep red. A lighter layer can look like rich orange or thin tomato, depending on the paper and pen. Some paper pushes it towards brown.
There's some lovely art in this review too, well worth reading further.